Abstract
Slags are one of the post-production wastes in iron and steel-making processes. Iron and steel production industries are looking for new technologies to recycle and reuse slags. There is a high potential for the recovery of iron from slags. Furthermore, the composition of slags should be adjusted to make them ready to be used in the cement and concrete industry. In addition to hydrometallurgical methods, reduction and remelting of slags can be considered an effective pyrometallurgical route to recycle and modify steel slag composition. In this study, hydrogen reduction of LD slag samples at different temperatures has been investigated. The results showed that the rate of the reduction increases significantly by increasing the temperature and almost all the wüstite reduces to metallic iron at 900 oC and 100% hydrogen. It was also found that calcium hydroxide decomposes at 500 oC and calcium decomposes with increasing temperature and vanadium is spread to calcium silicates and ferrites